The nonparametric equivalent of the Pearson correlation coefficient is the:
A) Kruskal-Wallis H test.
B) chi-square.
C) Wilcoxon signed-rank test.
D) Spearman rank-order correlation coefficient.

Question

Quizplus · Accepted Answer

The Spearman rank-order correlation coefficient is the nonparametric equivalent of the Pearson correlation coefficient. It measures the strength and direction of the association between two variables when the variables are measured on an ordinal or interval scale. Kruskal-Wallis H test and Wilcoxon signed-rank test are nonparametric tests for comparing two or more groups or variables, while chi-square is used to test for independence between two variables in a contingency table.

The Nonparametric Equivalent of the Pearson Correlation Coefficient Is The